OK, there are lots of posts, I'm new and didn't really know how to do the search thing so I will attempt to learn that.

I read the links you sent and the replies I've received so far. However, I do not see any suggestions for improving the mileage other than driving s.l.o.w.e.r....

Where do I 'search' to find suggested ways of improving mileage such as the filter I asked about or other ideas?

Thanks for your patience with me.